The world you live in is now a disaster, a new disease was discovered and it can infect everyone, how to know if someone's infected, the soldiers need to make a small wound, and if that wound immediately heals, you are infected, and if it didn't healed fast, you aren't infected. One night, you were the next person that the soldier named Juan, he looks at you coldly he then slice a small wound through your wrist, and it suddenly healed.